The PO installed it, so I'm not sure, but he said it's a stage 2 racing clutch. I can't compare with the F1 clutch kit on ebay, but I've heard good things about them. I'd pay close attention to how much torque an aftermarket clutch can hold onto as a first metric. UUC is a great brand, though expensive, so keep that in consideration, too. Other brands might not be...